FI91926C - Transformer intermediate socket inverter - Google Patents

Description

91926

Transformer champion changer. - Omkastare for tansforraatorraellannuttag.

The present invention relates to an inductor device, and more particularly to a transformer having connectors by means of which changes in the length of the cam can be easily effected.

Large manufacturing companies with markets around the world consider it necessary to develop equipment that can operate on a variety of power supplies with different voltages and frequencies. Devices with a fairly high ki-lovolt-to-ampere ratio (KVA), such as large computers, are usually connected to three-phase power cords. In the United States, the general three-phase power supply is 280 volts, line-to-line at 60 hertz. In England and most of the United Kingdom, the general three-phase power supply is 415 volts, line-to-line 50 hertz. Continental Europe produces power at a frequency of 50 hertz at a voltage of 220 volts from line to line or at a voltage of 380 volts from line to line, depending on the location. In Japan, the general voltage is 200 volts from line to line. The frequency in Japan is 50 hertz in some locations and 60 hertz in others.

Since the design of a particular part of a device is generally not known at the time of manufacture, and because standardization of the device results in lower manufacturing costs, it is desirable that the design of a single device include as much global tension as possible and that certain conditions , which are required at a particular location, are kept mini-anywhere as well as kept as simple as possible. The hardware elements included in the device to allow the use of local power supplies should also be as simple and inexpensive as possible.

The problem (i.e., establishing connectivity to numerous voltage and frequency combinations) is greatly increased by the introduction of Ferro-resonating transformers in devices for pre-gain and buffering against voltage drops and ripple. In this case, it is necessary to arrange separate champions for each frequency, even when the frequencies are the same. When both frequency and voltage are taken into account, it is not uncommon to find that at least three inputs are required in each primary circuit of the transformer. The present invention provides a mechanism for selecting a suitable champion for a given input voltage and frequency.

Therefore, the present invention provides a transformer tap changer. One of the plurality of champions from at least one transformer is put into operation by selecting a predetermined plug to be connected to the predetermined jack. The switching device between each transformer and the corresponding jack is such that each pin of said jack is operatively connected to a predetermined transformer connection in the respective transformer, the respective selectable selections of each transformer being connected to different pins of the respective jacks. In addition, the start-up of each transformer is operatively connected to the same jack of the corresponding jack. A plurality of plugs, the number of plugs of which is equal to the number of pins of the jacks, are incorporated in the device / each plug having a plurality of pin positions corresponding to the pins of the jack.

Each pin of each plug corresponding to the pin of the start selection is operatively connected to the first input connector. Each plug has a different connector pin than all other plugs operatively connected to another input connector.

Thus, it is an object of the invention to provide an apparatus for exchanging transformer valves to allow operation of a predetermined apparatus; mivan any of a number of power supplies, with each power supply having a different voltage.

Another object of the invention is to provide a device for switching transformers in order to allow a predetermined device to operate on any of a number of power sources, each of which: has a different frequency.

3,91926

Yet another object of the invention is to provide a device for changing the transformer taps to allow a predetermined device to operate on any of a number of power sources, each power source having a different voltage and frequency combination.

Yet another object of the invention is to provide an improved means for selecting the primary timelessness of a transformer in a three-phase current system for direct connection to various voltage and frequency sources.

Yet another object of the invention is to provide a selectivity of the primary timeless in a form that allows for easy on-site conversion to enable the particular voltage and frequency combination available at that location.

In order to carry out the above tasks, the device according to the invention is characterized by the things set forth in the characterizing part of claim 1.

These and other objects of the invention will become apparent from the following description taken in conjunction with the accompanying drawings, in which like parts denote the same parts and in which the drawings form part of this embodiment.

Figure 1 shows a prior art approach for selecting the primary inputs of a transformer,

Figure 2 shows an improved timeless selection of a preferred embodiment of the invention,

Figure 3 shows a timeless selection similar to the interception configuration of Figure 2, but using a three-phase delta interface input instead of a Y interface; and Figures 4 and 5 show an apparatus similar to that of Figure 2 but including additional transformer outlets.

«'There are numerous prior art approaches for selecting primary transformers for 4,91926 transformers. Eras such a state-of-the-art approach involves the primary stripping of the transformer into terminal strips (not shown). The source voltage connections are then wound, one at a time, to the appropriate locations on the coating solutions.

Figure 1 shows another prior art approach for selecting primary transformer inputs, and is a commonly used approach. Three Ferro resonant transformers (or more simply transformers) 10, 20, 30 are connected to a three-phase four-wire power supply having a ground conductor N and three-phase conductors AA, BB, and CC. Each transformer 10, 20, 30 has Ensio coils 11, 21, 31, secondary coils 13, 23, 33 and capacitor coils 12, 22, 32, respectively. Each of the primary coils 11, 21, 31 has an initial terminal D at the other end of the coil. Each of the primary coils 11, 21, 31 has three taps along the coils, which are named terminals A, B, and C (these terminals are also called interlocks), input A is the terminal of the corresponding primary circuit 11, 21, 31. The output capacitors 14, 24, 34 are connected across the capacitor coils 12, 22, 32 of each transformer 10, 20, 30, respectively. The output voltage is applied to the end points EE, FF of each of the secondary coils 13, 23, 33 of each transformer 10, 20, 30, whereby the output voltage is rectified in many applications, which can then be used as direct current sources to switch power sources.

Each transformer 10, 20, 30 is associated with three jacks and one plug, which acts as a plug for the corresponding transformer.

Thus, jacks 101, 102, 103 and plug 100 are associated with transformer 10, jacks 201, 202, 203 and plug 200 are associated with transformer 20, and jacks 301, 302, 303 and plug 300 are associated with transformer 30. The three jacks associated with each transformer form a way to select one from terminals A, B, or C. To the first transformer 10, the end point D of the primary coil 11 is connected to pins 2 of all three jacks 101, 102, 103 connected to the first transformer 10. The terminal A of the first transformer 10 is connected to pin 1 of the first jack * 101, the terminal of the first transformer 10 B is connected 591926 to pin 1 of the second jack 102, and the input C of the transformer 10 is connected to pin 1 of the third jack 103. Plug 100 has pin 1 connected to phase AA of the three-phase input voltage, and pin 2 connected to ground wire N. Thus, when plug 100 points -this to the first jack 101, connect the input A to phase AA and the initial connection D to the ground conductor N. When the plug 100 is to the second jack 102, the input B is connected to phase AA and the initial terminals D are connected to the ground conductor N, and when the plug 100 is inserted into the third jack 103, the input A is connected to the phase AA and the input terminal D is connected to the ground conductor N. AA - N) connect to input A, input B or input C, by plugging one of the fractions 101, 102, 103 into plug 100.

Similarly, transformer 20 is connected to stage BB of a three-phase input voltage, in which the intake selection is made by connecting plug 200 to jacks 201, 202 or 203, and transformer 30 is connected to stage CC of three-phase input voltage, or to jacket 303.

The selected input, input A, input B, or input C, depends on the amplitude and frequency of the phase input voltage so as to achieve a predetermined output voltage which is: in the operating range of current sources EE-FF. It will be appreciated by those skilled in the art that multiple taps and associated jacks may be formed to ensure that a predetermined output voltage is achieved.

Figure 2 shows an improved timeless selection of the invention. Each of the three transformers 10, 20, 30 is associated with a jack 101, 201, 301, and a plug 100, 200, 300. In a preferred embodiment of the invention, each jack has four pins, and each transformer is operatively connected to its respective jack in a different manner. Each plug in MyQs is connected to the input voltage differently. Thus, transformer 10 has tap A, tap B, tap C, and 6 91926 tap D operatively coupled to pin 1, pin 2, pin 3, and pin 4 of jack 101, respectively, transformer 20 has bus A, tap B, champ C, and champion. D operatively connected to pin 2, pin 3, pin 1, and pin 4, respectively, and transformer 30 has champion A, champion B, input C, and champion D operatively connected to pin 3, pin 1, pin 2, and pin 4. in this order. Each plug 100, 200, 300 has four pins, with pin 4 of each plug connected to ground N. Pin 1 of plug 100 is connected to input voltage stage AA, pin 2 of plug 200 is connected to Input voltage stage BB and pin 3 of input 300 is connected to input terminal. To select the timeless A, the plug 100 is connected to the jack 101, the plug 200 to the jack 201 and the plug 300 to the jack 301. To select the timeless B of each transformer 10, 20, 30, the plug 100 is connected to the jack 301, the plug 200 to the jack 101 and the plug 300 to the jack 201. to select the timing C of the transformer 10, 20, 30, the plug 100 is connected to the jack 201, the plug 200 to the jack 301 and the plug 300 to the jack 101. The plug arrangement for the timing selections is shown in Table 1.

TABLE 1 - TRANSMISSION OPTIONS SELECT A SELECT B SELECT C

PLUG JACKET PLUG JACKET PLUG JACKET

100 101 100 301 100 201:. 200 201 200 101 200 301 300 301 300 201 300 101

It can thus be seen that the timeless selection function is achieved by a new switching arrangement in which the transformer terminals A, B, and C are wired to different pins of the respective jacks 101, 102, 103, and the three-phase inputs of the three-phase input voltage 300 are connected, In a preferred embodiment of the invention, the timeless selection is made by connecting the plugs 100, 200, 300 to a suitable jack 101, 201, 301, as described above. Those skilled in the art will appreciate that a three-phase input voltage is not required, but the input voltage may be single-phase, with phase AA, phase BB and phase CC being essentially the same input voltage conductor. A similar

II

The 7 91926 selection approach could also be applied to the selection of output selections. In addition, those skilled in the art will appreciate that additional drawings may be used, thereby correspondingly increasing the number of studs per jack, and this situation will be illustrated and described below. Auxiliary transformers can be used in conjunction with auxiliary jacks and corresponding plugs.

From the preferred embodiment of the invention, it can be easily seen / that the number of jackets is substantially reduced compared to the configurations according to the prior art. A set f with p transformers, each with a starting conductor and n individually selectable taps, requires a state-of-the-art selector p jacks and n x p plugs (or p plugs and n x p jacks). The selection device according to the invention also requires p jacks, but only n plugs, provided that n is greater than or equal to p (if n is less than p, p jacks and p plugs are required). It is observed that in the case of a single transformer (i.e. p = 1), the invention is of no use.

Figure 3 shows the same non-champion selection described above in conjunction with Figure 2, but is used with a three-phase delta input connection instead of a Y-configuration. It is often possible to connect a given set to the primary and either delta or Y configuration of the transformer, i.e. line-to-line or 1 in-ground. This option helps to reduce the primary voltage of the transformer that is required.

Figure 4 shows a device similar to that shown in Figure 2, but with transformers having an extra selection. In this case, the respective fractions 101, 201, 301 and the corresponding plugs 100, 200, 300 have five pins. In addition, it • includes an extra plug 400 that also has five pins. The input voltage is shown as a single-phase input voltage, but those skilled in the art will readily appreciate a configuration that uses a three-phase input voltage as described above. The connection of the transformer valves A to E to the corresponding jacks 1 to 5 is shown in Table 2. From Table 91926 8 it can be easily seen that the champion 10 of the transformer 10, the champion A t of the transformer 20 and the champion 30 of the transformer 30 (not shown) A is each connected to a different pin corresponding to each of them. Thus, the champion A of the transformer 10 is connected to the pin 1f of the jack 101, the champion A of the transformer 20 is connected to the pin 2 of the jacket 201, the champion A of the transformer 30 is connected to the pin 3 of the jack 301 and the champion 40 of the transformer 40 (not shown) pin 4. Similarly, a similar jar arrangement has been made for each other champion in their connection to their respective jacks. In this case, plug 400 is required; to ensure that all four input inputs A to D of the three transformers 10/20/30 are used. Instead, it is not necessary; that a fourth transformer / transformer 40 / and a corresponding jack 401 are used. The connection of the plug to the jack to select a predetermined champion of the transformer is shown in Table 3. Figure 5 shows an arrangement / in which the transformers 10/20/30 use six selectors / selectable input. Table 4 shows the connections between the 10/20/30 ballasts of the transformers and the corresponding jack pins of the configuration of Figure 5. The plug-and-socket connection for selecting the predetermined champion of the 6-champions of Fig. 5 is shown in Table 5. Again, plugs 400, 500 / are needed / to ensure / that all transformer taps can be used / even if transformers 40/50 and their corresponding jacks are not needed / and therefore have not been presented. It is noted (that the champion-pin connection of each transformer rotates so that each transformer is wired differently to its respective jack.

91 926

TABLE 2 - VXIOTO SWITCHING

9 TRANSFORMER 10 JACKET 101 TRANSFORMER 20 JACKET 201

VALIOTTO PINS VXLIOTTO PINS

Al A 2 B 2 B 3 C 3 C 4 D 4 Dl TRANSFORMER 30 JAKIN 301 TRANSFORMER 40 JAKIN 401

VXLIOTTO PIN VXLIOTTO PIN

A3 A 4 B 4 Bl

Cl C 2 D 2 D 3> ·

TABLE 3 - VXLIOTTO SELECTION

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SELECT VSLIOTTO A SELECT VALIOTTO B

PLUG JACKET PLUG JACKET

100 101 100 --- 200 201 200 101 300 301 300 201 400 400 301

SELECT VXLIOTTO C SELECT VSLIOTTO D

PLUG JACKET PLUG JACKET

100 301 100 201 200 200 301 300 101 300 --- 400 201 400 101 «

TABLE 4 - SELECTION SELECTION

11 91926 TRANSFORMER 10 JAKIN 101 TRANSFORMER 20 JAKIN 201

VALIOTTO PINS VALIOTIO PINS

Al A 2 B 2 B 3 C 3 C 4 D 4 D 5 E 5 El TRANSFORMER 30 JAKIN 301 TRANSFORMER 40 JAKIN 401

VALIOTTO PINS VXLIOTTO PINS

A3 A 4 B 4 B 5 C 5, C 1

Dl D 2 E 2 E 3

TRANSFORMER 50 JAKIN 501 VXLIOTTO PIN

A 5 B 1 c 2 D 3 E 4

TABLE 5 - VXLIOTTO SELECTION

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SELECT VXLIOTTO A SELECT VXLIOTTO B

PLUG JACKET PLUG JACKET

100 101 100 --- 200 201 200 101 300 301 300 201 400 --- 400 301 500 500 ---

SELECT VXLIOTTO C SELECT VSLIOTTO D

PLUG JACKET PLUG JACKET

100 --- 100 301 200 --- 200 --- 300 101 300 --- 400 201 400 101 500 301 500 201 SELECT THE VXLIOTTO E PLUG JACKET 100 201 200 301 300 --- 400 --- 500 101 13 91926

Although a preferred embodiment of the invention has been described above, it is noted that many changes and modifications may be made therein without departing from the essential spirit and scope of the invention. It is therefore intended that the appended claims cover all such changes and modifications as fall within the true scope of the invention.

• • · »·

Claims (3)

14 91926 An apparatus for selecting one of a plurality of taps (A, B, C, D) for selecting from at least two transformers (10, 20, 30) for connection to a power supply, said transformer taps being the screw taps of each of said transformers, and wherein said transformer taps one said transformer input (D) of the transformers is the start input of said scraper and the other inputs (A, B, C) are selectable inputs; said device comprising jacks (101, 201, 301), one jack connected to each transformer, said device being characterized in that: a) each jack has a plurality of pins (1, 2, 3, 4) corresponding to a plurality of taps, each of said the pins form a contact point for each tap of the associated transformer, each pin of the corresponding jack member is operatively connected to a predetermined selectable transformer input of the associated transformer such that the corresponding selectable tap of each transformer is operatively connected to it; in addition, the start input of each transformer is operatively connected to the same pin of the associated jack (4); and b) it has a plurality of plugs (100, 200, 300), the number of plugs being less than the number of pins of said jacks, each plug having a plurality of connecting pins (1, 2, 3, 4) corresponding to the pins of said jacks, each plug a connecting pin (4) corresponding to the pin of the starting socket is operatively connected to the first terminal (N) of said power source, and each plug has a different connecting pin than the other plugs operatively connected to the second terminal (AA, BB, CC) of said power supply for connecting one plug of said fractions such that when a predetermined plug is connected to a predetermined jack, a predetermined intake is selected. 15 91926 Device according to claim 1, characterized in that said power supply is a three-phase power supply in a delta configuration, and that a pair of pins of each plug connected to the terminals of said power supply is connected to different phases (AA, BB, CC) of said power supply. Device according to claim 1, characterized in that said power supply is a three-phase power supply in Y-configuration, and in that a pair of pins of each plug connected to the power supply terminals is connected to different phase terminals (AA, BB, CC) and ground terminal (N) of said power supply. 91926 16